linux-kernel - Re: [PATCH v3 1/3] dt-bindings: i2c: qcom,i2c-qup: Convert txt to YAML schema

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Message-ID: <20210125221633.GA1112939@robh.at.kernel.org>
Date:   Mon, 25 Jan 2021 16:16:33 -0600
From:   Rob Herring <robh@...nel.org>
To:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...ainline.org>
Cc:     agross@...nel.org, linux-kernel@...r.kernel.org,
        konrad.dybcio@...ainline.org, marijn.suijten@...ainline.org,
        martin.botka@...ainline.org, bjorn.andersson@...aro.org,
        devicetree@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-i2c@...r.kernel.org, phone-devel@...r.kernel.org
Subject: Re: [PATCH v3 1/3] dt-bindings: i2c: qcom,i2c-qup: Convert txt to
 YAML schema

On Thu, Jan 14, 2021 at 07:04:13PM +0100, AngeloGioacchino Del Regno wrote:
> Convert the qcom,i2c-qup binding to YAML schema.
> 
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...ainline.org>
> ---
>  .../devicetree/bindings/i2c/qcom,i2c-qup.txt  | 40 ---------
>  .../devicetree/bindings/i2c/qcom,i2c-qup.yaml | 87 +++++++++++++++++++
>  2 files changed, 87 insertions(+), 40 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/i2c/qcom,i2c-qup.txt
>  create mode 100644 Documentation/devicetree/bindings/i2c/qcom,i2c-qup.yaml
> 
> diff --git a/Documentation/devicetree/bindings/i2c/qcom,i2c-qup.txt b/Documentation/devicetree/bindings/i2c/qcom,i2c-qup.txt
> deleted file mode 100644
> index dc71754a56af..000000000000
> --- a/Documentation/devicetree/bindings/i2c/qcom,i2c-qup.txt
> +++ /dev/null
> @@ -1,40 +0,0 @@
> -Qualcomm Universal Peripheral (QUP) I2C controller
> -
> -Required properties:
> - - compatible: Should be:
> -   * "qcom,i2c-qup-v1.1.1" for 8660, 8960 and 8064.
> -   * "qcom,i2c-qup-v2.1.1" for 8974 v1.
> -   * "qcom,i2c-qup-v2.2.1" for 8974 v2 and later.
> - - reg: Should contain QUP register address and length.
> - - interrupts: Should contain I2C interrupt.
> -
> - - clocks: A list of phandles + clock-specifiers, one for each entry in
> -   clock-names.
> - - clock-names: Should contain:
> -   * "core" for the core clock
> -   * "iface" for the AHB clock
> -
> - - #address-cells: Should be <1> Address cells for i2c device address
> - - #size-cells: Should be <0> as i2c addresses have no size component
> -
> -Optional properties:
> - - clock-frequency: Should specify the desired i2c bus clock frequency in Hz,
> -                    defaults to 100kHz if omitted.
> -
> -Child nodes should conform to i2c bus binding.
> -
> -Example:
> -
> - i2c@...24000 {
> - 	compatible = "qcom,i2c-qup-v2.2.1";
> - 	reg = <0xf9924000 0x1000>;
> - 	interrupts = <0 96 0>;
> -
> - 	clocks = <&gcc GCC_BLSP1_QUP2_I2C_APPS_CLK>, <&gcc GCC_BLSP1_AHB_CLK>;
> - 	clock-names = "core", "iface";
> -
> - 	clock-frequency = <355000>;
> -
> - 	#address-cells = <1>;
> - 	#size-cells = <0>;
> - };
> diff --git a/Documentation/devicetree/bindings/i2c/qcom,i2c-qup.yaml b/Documentation/devicetree/bindings/i2c/qcom,i2c-qup.yaml
> new file mode 100644
> index 000000000000..c5c7db3ac2a6
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/i2c/qcom,i2c-qup.yaml
> @@ -0,0 +1,87 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +
> +$id: http://devicetree.org/schemas/i2c/qcom,i2c-qup.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Qualcomm Universal Peripheral (QUP) I2C controller
> +
> +maintainers:
> +  - Andy Gross <agross@...nel.org>
> +  - Bjorn Andersson <bjorn.andersson@...aro.org>
> +
> +description: Binding for Qualcomm "QUP" I2C controllers
> +
> +allOf:
> +  - $ref: /schemas/i2c/i2c-controller.yaml#
> +
> +properties:
> +  compatible:
> +    enum:
> +      - qcom,i2c-qup-v1.1.1
> +      - qcom,i2c-qup-v2.1.1
> +      - qcom,i2c-qup-v2.2.1
> +
> +  reg:
> +    items:
> +      - description: QUP I2C register iospace

Just 'maxItems: 1' is sufficient for a single entry.

> +
> +  clocks:
> +    items:
> +      - description: Core QUP I2C clock
> +      - description: AHB clock
> +
> +  clock-names:
> +    items:
> +      - const: core
> +      - const: iface
> +
> +  clock-frequency:
> +    minimum: 100000
> +    maximum: 1000000
> +    default: 100000
> +
> +  dmas:
> +    items:
> +      - description: RX DMA Channel phandle
> +      - description: TX DMA Channel phandle
> +
> +  dma-names:
> +    items:
> +      - const: rx
> +      - const: tx
> +

> +  '#address-cells':
> +    const: 1
> +
> +  '#size-cells':
> +    const: 0

Can drop these. Covered by i2c-controller.yaml

> +
> +required:
> +  - compatible
> +  - clocks
> +  - clock-names
> +  - reg
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/qcom,gcc-msm8998.h>
> +    #include <dt-bindings/gpio/gpio.h>
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> +    i2c@...5000 {
> +        compatible = "qcom,i2c-qup-v2.2.1";
> +        reg = <0x0c175000 0x600>;
> +        interrupts = <GIC_SPI 95 IRQ_TYPE_LEVEL_HIGH>;
> +        clocks = <&gcc GCC_BLSP1_QUP1_I2C_APPS_CLK>,
> +                 <&gcc GCC_BLSP1_AHB_CLK>;
> +        clock-names = "core", "iface";
> +        clock-frequency = <400000>;
> +        dmas = <&blsp_dma 4>, <&blsp_dma 5>;
> +        dma-names = "rx", "tx";
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +    };
> -- 
> 2.29.2
>